Pulse Transformers Significantly Reduce Board Sizes

TDK-EPC has developed a new series of EPCOS EP5 SMT pulse transformers used to couple gate-drive circuits to MOSFETs and IGBTs operating at switching frequencies within a range of 150kHz to several MHz.

Available with a wide range of turns ratios, polarities and outputs, the new transformers use miniaturized EP5 cores - giving the devices a compact dimension of only 8.1x6.7x5.4mm. As several transformers are usually used in a circuit, the size reduction of the devices results in significant space savings on the circuit board.


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Also, the devices' winding technology limits parasitic capacitances between windings to around 25pF to 95pF only. Stray inductances are likewise low, ranging between 0.9µH and 2.5µH. Short-term dielectric strength is tested to 1.5kV DC for all types of the B82804A* series. These components are designed for ambient temperatures of up to 85°C and operating temperatures of up to 125°C. Their terminal configuration and pin assignment correspond to the industry standard.

The products are mainly suited to half- and full-bridge converters as well as in frequency converters or inverters.

TDK-EPC